ALTER TABLE OBJECT_PROPERTY DROP FOREIGN KEY FK_OBJECT_PROPERTY;
ALTER TABLE PROPERTY_TYPE DROP FOREIGN KEY FK_TYPE_PROPERTY_TYPE;
ALTER TABLE OBJECT DROP FOREIGN KEY FK_OBJECT_TYPE;
ALTER TABLE PROPERTY_TYPE DROP FOREIGN KEY FK_PROPERTY_TYPE_TARGET_PROPERTY;
ALTER TABLE OBJECT_PROPERTY DROP FOREIGN KEY FK_OBJECT_PROPERTY_PROPERTY_TYPE;
DROP TABLE IF EXISTS OBJECT;
DROP TABLE IF EXISTS OBJECT_PROPERTY;
DROP TABLE IF EXISTS TYPE;
DROP TABLE IF EXISTS PROPERTY_TYPE;
DROP TABLE IF EXISTS DEFAULT_OBJECT;
